New and previously described Acleotrema species (Monogenea, Diplectanidae) parasitizing sea chubs (Centrarchiformes: Kyphosidae) in the Southeastern Pacific Ocean

During a study on the diversity of monogeneans infecting kyphosid fishes off the coast of Puerto Santa Rosa, Lambayeque region, northern Peru, specimens of the Cortez sea chub Kyphosus elegans (Peters) and the brassy chub K. vaigiensis (Quoy & Gaimard) were examined. Five diplectanids, including...

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Autores principales: August Santillan, Celso Cruces, Rosa Martínez-Rojas, Aarón Mondragón-Martínez, Jhon Chero
Formato: Artículo
Lenguaje:inglés
Publicado: 2025
Materias:
Biology
Holotype
Synonym (taxonomy)
Zoology
Monogenea
Taxonomy (biology)
Pacific ocean
Genus
Fishery
Gill
Fish <Actinopterygii>
Oceanography
Geology
Animals
Animal Structures anatomy & histology
Animal Structures growth & development
Female
Fish Diseases parasitology
Gills parasitology
Male
Organ Size
Pacific Ocean
Perciformes classification
Perciformes parasitology
Platyhelminths anatomy & histology
Platyhelminths classification
Platyhelminths isolation & purification
Trematoda anatomy & histology
Trematoda classification
Trematoda growth & development
Trematode Infections parasitology
Trematode Infections veterinary
Body Size
Animal Distribution
Physical Sciences Environmental Science Ecology Parasite Biology and Host Interactions
Physical Sciences Environmental Science Ecology Crustacean biology and ecology
Physical Sciences Earth and Planetary Sciences Oceanography Marine Biology and Ecology Research
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Sumario:During a study on the diversity of monogeneans infecting kyphosid fishes off the coast of Puerto Santa Rosa, Lambayeque region, northern Peru, specimens of the Cortez sea chub Kyphosus elegans (Peters) and the brassy chub K. vaigiensis (Quoy & Gaimard) were examined. Five diplectanids, including a new species, were identified: Acleotrema alejandroi sp. nov. from K. vaigiensis; A. diplobulbus (Yamaguti, 1968) from K. vaigiensis; A. nenue (Yamaguti, 1968) Dominques & Boeger, 2007 from both K. vaigiensis and K. elegans; A. oliveri (León-Régagnon, Pérez-Ponce de León & Garcia Prieto, 1997) from K. elegans and K. vaigiensis; A. spiculare (Yamaguti, 1968) from K. vaigiensis. Acleotrema alejandroi sp. nov. is easily differentiated from all congeneric species by its male copulatory organ (MCO), which is J-shaped with a spatulate distal end. The middle portion of MCO is surrounded by a sclerotized sac; and the distal portion of the sac bears an elongated, sclerotized U-shaped process. Acleotrema oliveri is redescribed based on examination of the type specimen (holotype and paratypes) and newly collected specimens. In addition, new morphometric data and whole-mount drawing of A. nenue, A. spiculare and A. diplobulbus are provided. Acleotrema nenuoides (Rakotofiringa, Oliver & Lambert, 1987) is considered a junior synonym of A. nenue. The present finding brings to 13, the number of known species of Acleotrema Johnston & Tiegs, 1922, and represents the first diplectanid species infecting kyphosid fishes from Peru. Furthermore, this study represents the first record of A. spiculare and A. diplobulbus after more than 50 years.

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